A hydrate is any compound that contains water in the form of H2O molecules and usually has a definite content of water by weight. Hydrates typically have a crystal like appearance that can vary in colour and have a naming scheme based on the compound and number of water molecules that are in the hydrate. Copper(II) sulfate pentahydrate‚ or CuSO4 * 5H2O‚ is a ratio of one copper sulfate to five (penta) molecules of water. Copper sulfate pentahydrate is a blue hydrate while anhydrous copper sulfate
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and was used to titrate a sulfuric acid solution wherein the sample salt was dissolved. The solution was heated to 90°C then titrated until a light pink colored solution was obtained. The experiment focused on determining the percentage of Sodium oxalate (Na2C2O4) in the sample and at the end of the experiment it was found to contain 49.45%. Experiment 9 focuses on determining the different concentrations of potassium permanganate solutions by finding its absorbance through the use of spectrophotometer
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when temperature is increased. Post Lab Questions 1. CoCl42- ions are present in this solution as they are blue colored and the color of the Cobalt Chloride solution was blue when we recorded the color and appearance of the solution. 2. Co(H2O)62+ ion was favored by the addition of water as it is pink colored and when we added water to the cobalt chloride solution‚ it became pink. This was because the amount of Co(H2O)62+ ions went up(more pink) to compensate or even out the change. Adding
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naphtha streams . Most metals in catalysis HDS is those at the middle of the transition metal series that are most active. Ruthenium disulfide appears to be the single most active catalyst‚ but binary combinations of cobalt and molybdenum are also highly active. Aside from the basic cobalt-modified catalyst‚ nickel and tungsten are also used‚ depending on the nature of the feed. For example‚ Ni-W catalysts are more effective for hydrodenitrogenation. Hydrodesulfurization is used in many things for example
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interactions. Description We will be mixing ionic compounds in solute-solute and solvent solute interactions. We will be combining sodium‚ potassium‚ calcium‚ magnesium‚ copper‚ iron‚ nickel and silver and some anions like chloride‚ sulfate‚ nitrate‚ oxalate‚ phosphate‚ and hydroxide. We will be seeing which one forms a precipitate or rings. Most likely the anions will be the insoluble. From there we will be making a flow chart that will go accordingly to our experiment. Materials Test tubes or containers
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investigate whether freezing a glow stick will affect its longevity. Hypothesis: The glow sticks will last longer when they are frozen than when they are at room temperature. Background information: Glow sticks are made of hydrogen peroxide‚ a phenyl oxalate called ester‚ and phosphorescent dye. The ester and phosphorescent dye are kept in one part of the glow stick‚ the hydrogen peroxide in the other‚ separated by a piece of glass. No chemical reaction occurs until the glass breaks‚ combining the chemicals
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spoil and deteriorate food beyond repair. To use food irradiation‚ you need two things a source or radiant energy and a way to confine the energy. (1) The source for gamma radiation can either be the radioactive form of the element cobalt‚ which would be Cobalt 60‚ and the element cesium‚ and that would be Cesium 137. These substances do not give off neutron which means that they don’t make anything around them radioactive. When not in use‚ this source is kept in a pool of water which completely
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Lab 1: Flame Test 11 Chemistry‚ university Preparation Conducted: September 20th‚ 2010 Purpose: To observe‚ and create a chart of the colours produced when solutions of known metal compounds are heated to high temperature. Question: What colours are produced when different metallic compounds are placed in a flame‚ and why this happens? Hypothesis/Prediction: Different salts will produce different colours when placed in a flame‚ due to the fact that each element has a different
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solutions used and wash off any splashes on your skin with cold running water. Apparatus required eye protection timer 2 measuring cylinders (100 cm3) pipette paper with a black cross on it Chemicals required sodium thiosulfate solution (15 g/dm3) cobalt(II) chloride solution (0.1 mol) iron(III) nitrate solution (0.1 mol) copper(II) sulfate solution (0.1 mol) iron(II) sulfate solution (0.1 mol) What to do 1 Draw a cross on a piece of paper and put it underneath a 100 cm3 measuring cylinder‚ or use
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Lab #3 Separating Metal Cations by Paper Chromatography Introduction/Purpose: In chemistry‚ it is important to effectively analyze the components in a given mixture. In order to do so‚ chemists will analyze a mixture either qualitatively or quantitatively using different methods and equipment. Qualitative analyses are subjective‚ and only gather “non-numerical” data such as the color‚ appearance‚ and smell of the components. This data
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